SKU: 35237980179
400 watt grow light bulb

400 watt grow light bulb Mass Metal Halide 400 Watt Bulb – MASS Hydroponics

Sale price$22.01 Regular price$24.46
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Ships within 48 hours · Estimated delivery Sep 6 - Sep 11

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Description

400 watt grow light bulb Mass Metal Halide 400 Watt Bulb – MASS HydroponicsMass Metal HalideBring the spectrum of the sun indoors! Mass Metal Halide is your full spectrum light source for highest quality flowering (and full growth cycle) indoors! One of the most powerful MH bulbs ever, with brighter output and a superior light spectrum. Designed to bring out the best in your plants during the flower cycle, increasing quality and even yield in many varieties! Its a myth that you need HPS for flower, and our MH bulb will show

Mass Metal Halide

Bring the spectrum of the sun indoors!

Mass Metal Halide is your full spectrum light source for highest quality flowering (and full growth cycle) indoors! One of the most powerful MH bulbs ever, with brighter output and a superior light spectrum. Designed to bring out the best in your plants during the flower cycle, increasing quality and even yield in many varieties! It’s a myth that you need HPS for flower, and our MH bulb will show you! Our bright white light is very similar to natural sunlight and has been shown to produce cannabinoids and terpenes that other indoor light sources don’t produce. Many growers notice huge improvements compared to LEDs, We have much better full range UV and IR, and a great color balance of efficient visible light. It’s easier to keep plants healthy with our light spectrum under a wider range of temperatures, so you can relax and enjoy your garden. The quality of flowers produced under Metal Halide is so incredible that I wanted to keep this technology going and try to deliver the best bulb possible!

For flowering, a 400w can cover up to a 3x3, 600w can cover up to 4x4 and a 1000w can cover up to a 5x5. For vegging, they can cover even larger areas.

To use our light, you’ll need a ballast and a hood/reflector. The ballast wattage must be matched to your bulb wattage, do NOT dim a metal halide bulb, even if your ballast has a dimming option. Please purchase the appropriate wattage for your space. We recommend the use of a PAR meter to get the exact proper light levels throughout your garden, as each reflector spreads light differently. The use of a PAR Meter is essential for large yields under MH. A rough estimate is 14-18 inches away from 600w and 24-30 inches away from 1000w. With air cooled hoods you can also get even closer! Our bulb is Enclosed Rated, so we recommend the iPower air cooled or cool tube hoods which can be connected directly to your exhaust duct. We recommend the Quantum ballast, which is available in both 600 and 1000 watts.

Please follow all safety precautions on the box and on our website. Our bulb is very safe when used properly! When installing, wear a clean glove: do not touch the bulb with your fingers, wipe clean with dry cloth if you do! Avoid spraying any liquids near the bulb. Oils from your fingers or liquids from sprays can heat up and explode the glass, so keep it clean. Enclosed hoods provide additional protection.

We have a website full of information to help you understand our light on a deeper level, and get the best out of your grow on your very first round! Take some time to read our site, and have a great grow! www.massmetalhalide.com

To see which equipment to use with your bulb, visit massmetalhalide.com/equipment to learn about hoods, ballasts, and compatability

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 35237980179

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SisterGoldenHair
Natrona Heights, US
★★★★★ 5
Perfect Everyday Tinted Face Sunscreen
I am a long-time user of Think body sunscreen and tried this to replace my current department store tinted face sunscreen, which is being discontinued. I was amazed how well this performed, given the low price! It is literally 1/4 of the cost of my current face sunscreen and I am almost as happy with it! It was much lighter in tint than I was expecting, but blended easily and provided more "cosmetic" coverage than my current tinted face sunscreen, but without looking making me look made-up. My skin is light with reddish undertones, and it really helped to tone the red down as well, an unexpected bonus. That said, I typically use make up that is either the 2nd (or occasionally 3rd) from the fairest shade in the line, regardless of brand, and I am not sure how well this product would work on someone whose skin is even a little darker than mine, without being obvious. It is definitely too light for my sons, who have more olive-toned complexions. This product is highly moisturizing, and does take about 10 minutes to "set" before I feel comfortable applying powder to cover up the shine it leaves (a little more than a "glow"). Its efficacy is excellent--I really put it to the test outdoors and was pleased to see I had not to picked up any color from the sun when I washed it off. The other big plus is that it did not make me break out, and I have what my dermatologist calls, "reactive skin," which means anything from chemicals in face products to the hairdryer at the salon have been known to set it off. Finally, like their body sunscreen this face sunscreen gets a safety rating of "1" from the Environmental Working Group. I think I have found a winner!
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Reviewed in the United States on September 3, 2019
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Michelle Cilibraise
Natrona Heights, US
★★★★★ 5
Nice face sunscreen!
Great face sunscreen! It has high zinc and looks nice under makeup. I will continue to purchase. Not sure why it’s only a SPF of 30. It has 24% zinc which is higher. It’s a little thicker than some of the thinner ones I’ve used but I like that. I feel I’m getting good coverage
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Reviewed in the United States on April 2, 2026
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Robert I. Hedges
Pawtucket, US
★★★★★ 3
An Effective Sunscreen With Some Drawbacks
I like the safety and effectiveness of Thinksport tinted sunscreen. It's formulated carefully and I found it quite effective; I appreciate that it's not tested on animals. It is easy to apply and blends in with no chalky or white residue and doesn't come off easily (in fact washing it off later is not especially easy). I very much appreciated its effectiveness as I didn't ever burn when using this tube. With all that in mind why did I give it only three stars and throw away the tube before I even used half of it? Two reasons: I frequently run while wearing sunscreen and that, obviously, leads to sweating. When you sweat with this anything that you touch with a treated surface will be smeared with the brown tint of the sunscreen (particularly your shirt when your face, neck, or arms contact it, which may be more than you think). This looks akin to pancake makeup on clothes. It washed out of the shirts I got it on, but they did seem to get dingier after multiple cycles (especially around the collar). The second reason I didn't like this sunscreen is that when applied to the forehead and then perspiring this product really stung my eyes. I have had that product with some other brands as well, so it's definitely not a Thinksport exclusive issue, but still it's annoying. I used almost half the tube then switched back to my normal brand, which while also not ideal in some ways, doesn't have these issues. I have not given up on the Thinksport brand entirely, as I have recently purchased some of their untinted sunscreen. I have only used it a few times, but initial impressions are good. If you are unconcerned about the issues of staining from this product or you don't plan to wear it while doing anything strenuous, the tinted Thinksport sunscreen product may work great for you: it's easy to apply and quite effective.
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Reviewed in the United States on August 2, 2018
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C. Grant
Dallas, US
★★★★★ 5
Have to protect our skin! This works
My daughter in law recommended this. It is light weight but gives good Sun protection. The color tint is perfect. Easy to add to the morning skin routine
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Reviewed in the United States on May 2, 2026
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Jill
Massapequa, US
★★★★★ 5
Perfection!
20+% Zinc +Titanium dioxide! perfect for prevention AND burn treatment.. in case you didn't know!
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Reviewed in the United States on April 14, 2026

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